Fuzzy control method and control system for temperature of fluidized bed product, and fluidized bed system

Abstract

The invention discloses a fuzzy control method and control system for temperature of a fluidized bed product. The control method comprises the following steps that the product temperature in a fluidized bed is obtained; and according to the deviation e between the product temperature and the preset temperature and the deviation change rate delta e per delta t in the unit time delta t, the openingdegree u of a heating steam proportion regulating valve of a heating unit is subjected to fuzzy control, so that the temperature of the product in the fluidized bed is within a constant range. The invention further discloses a fluidized bed system which comprises a fluidized bed body and a heating unit; the output end of the heating unit is connected with the fluidized bed body; the heating unit comprises a heater and a steam input pipeline, wherein the steam input pipeline is provided with the heating steam proportion regulating valve; and the fluidized bed system further comprises the fuzzycontrol system for the temperature of the fluidized bed product as described above, wherein the control unit in the fuzzy control system for the temperature of the fluidized bed product is separatelyconnected with a temperature acquisition unit and the heating steam proportion regulating valve. The fuzzy control method and control system and the fluidized bed system have the advantages of precisetemperature control, high drying efficiency and the like.

Description

technical field [0001] The invention mainly relates to the technical fields of medicine and food packaging, in particular to a fuzzy control method, a control system and a fluidized bed system for product temperature in a fluidized bed. Background technique [0002] The fluidized bed is a device used to uniformly dry the material that has been mixed uniformly by a wet granulator and wet granulated during the production of solid preparations. The preheated air is introduced from the bottom of the equipment container, so that the material particles in the fluidized bed are blown up into a boiling state, so as to realize the uniform drying of the material. In addition, the partial fluidized bed can also realize one-step granulation. In the fluidized bed drying process, due to the specific physical and chemical properties of some materials, it is extremely sensitive to temperature, so it is particularly important to control the temperature of the materials in the fluidized bed ...

AI Technical Summary

Problems solved by technology

There are many factors that affect the material temperature of a fluidized bed, such as ambient temperature, inlet air temperature, inlet air component, heating steam temperature, heat exchanger efficiency, and bed heat dissipation, etc., and there is often a coupling relationship between various factors , so it is very difficult to establish an accurate mathematical model between material temperature and these factors

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